Yaskawa MP940 Hardware Manual - Manual (Page 40)

MotionSuite™ MP940 Machine Controller Hardware Manual Section 5: Communications
37
Indicators Problem Probable Cause Possible Solution
MS green lit
NS green lit Communica-
tions are
occurring but
the receive
data is not
being
refreshed DeviceNet
master is in
idle status Remove the cause of the idle status of the DeviceNet
master.
MS green lit
NS green lit Communica-
tions are
occurring but
the receive
data refresh is
delayed Excessive traf-
fic on
DeviceNet.
The communi-
cations cycle
time setting is
too low for the
I/O response
receive time.
The process-
ing load for
data exchange
with the mas-
ter is too large. (1) Increase communications cycle time for the
DeviceNet master.
(2) Increase the baud rate.
(3) Increase the CPU scan time for the I/O allocation
SYNC setting.
„ Slave
Troubleshooting Slaves